Abstract: Alkaline earth metal alumino silicates of the formula:(0.1-720)Me:(0.005-100)B.sub.2 O:Al.sub.2 O.sub.3 :(1.0-400)SiO.sub.2 :XH.sub.2 Owherein Me is an alkaline earth metal, B is an alkali metal, and X is an integer of 1 to 3, are amorphous very high structure absorbents. The products are prepared by reaction of a reactive clay with an alkaline earth metal or hydroxide.

Abstract: Sodium silicate solutions are prepared by dissolving sand in sodium hydroxide solution at a pressure of at least 100 psig and at a temperature of at least 130.degree. C. to produce a sodium silicate solution having a silica to sodium oxide molar ratio of between 2.4:1 and 2.8:1, and activating said sodium silicate solution by reaction with from about 50 to 200 ppm of alumina.

Abstract: A jig construction having adjustable spacers which may be positioned to accommodate various sizes of pre-cut paperboard or cardboard sheets from which folded pallets are formed. The jig includes manually and semi-automatically actuated mechanisms for adjusting the size of the cardboard pallet formed thereon, and to facilitate bending and creasing sections of the paperboard for forming the pallet construction.

Abstract: Disclosed are thixotropic polyester compositions wherein the thixotropic characteristics are provided by incorporation into the polyester of a member selected from the group consisting of a precipitated silicon dioxide and a mixture of a precipitated silicon dioxide and a fumed silica. The resulting thixotropic polyester compositions are useful in industries where the resin must not drain from a vertical surface before cure, such as in the boat building industry, and in electrical and transportation applications, and particularly in fiberglass reinforced unsaturated polyester resins and gel coats.

Abstract: Zeolites of small and uniform size are formed having high magnesium exchange capacities. Zeolite A is disclosed having an average particle size less than 1.7 microns, a calcium carbonate exchange capacity of more than 230 mg calcium carbonate per gram zeolite and a magnesium exchange capacity of more than 140 mg magnesium carbonate per gram zeolite. This zeolite A is produced from a reaction mixture having a water to sodium oxide molar ratio of less than 35:1, and a sodium oxide to silica molar ratio of between 1:1 and 4:1, wherein the silica to alumina molar ratio is greater than 3:1 when the sodium oxide to silica molar ratio is less than 4:3 and the sodium oxide to alumina molar ratio is greater than 4:1 when the sodium oxide to silica molar ratio is greater than 4:3. Zeolite X is disclosed having an average particle size less than 2.

Abstract: A method and a magnetic separator are disclosed particularly for the removal of particles of low magnetic susceptibility, present usually as impurities and often largely of submicron sizes, from aqueous slurries of clay or other minute mineral particles. A high intensity magnetic field is established between vertically spaced pole members in the general direction of flow of the slurry through a canister disposed between confronting surfaces of the pole members, the canister being packed with multitudinous elongate ferromagnetic elements which present surface irregularities with each contacting, yet also spaced from others, so as to constitute a flux conductive matrix that diverts the slurry flow into diverse courses and concentrates the flux at myriad points therein.

Abstract: A method for producing a precipitated silicon dioxide having a new combination of physical and chemical properties is disclosed. The pigments are produced by acidulating a solution of an alkali metal silicate with an acid under controlled precipitation conditions. The aqueous reaction medium comprising the precipitated silica is then post-conditioned by introducing a second silicate solution into the reaction vessel and thereafter adding additional acid to react with the said second silicate solution. By varying the amount of the silicate employed in the post-conditioning step, a product is obtained which has a unique combination of physical and chemical properties including reduced wet cake moisture content, high surface areas and oil absorptions, improved surface activity, friability, wetting characteristics, and the like. The product has particular utility for use as a rubber reinforcing agent because of its increased surface activity and oil absorption, etc.

Abstract: Novel precipitated silicon dioxide abrasive compositions which can be incorporated into therapeutic toothpaste compositions containing both soluble fluoride salts and soluble phosphate salts are disclosed. The abrasives comprise low structure precipitated silicon dioxides which have been reacted with about 10 to 300 parts per million alkaline earth metal ion, particularly calcium. Reaction with the alkaline earth metal ion minimizes abrasive interaction with the fluoride ion source in therapeutic toothpaste. Also provided are methods for preparation of the novel silicon dioxide abrasives and resulting toothpaste formulations containing such abrasives.

Abstract: Novel precipitated silicon dioxide abrasive compositions which can be incorporated into therapeutic toothpaste compositions containing both soluble fluoride salts and soluble phosphate salts are disclosed. The abrasive comprise low structure precipitated silicon dioxides which have been reacted with about 10 to 300 parts per million alkaline earth metal ion, particularly calcium. Reaction with the alkaline earth metal ion minimizes abrasive interaction with the fluoride ion source in therapeutic toothpaste. Also provided are methods for preparation of the novel silicon dioxide abrasives and resulting toothpaste formulations containing such abrasives.

Abstract: Zeolites of small and uniform size are formed having high magnesium exchange capacities. Zeolite A is disclosed having an average particle size less than 1.7 microns, a calcium carbonate exchange capacity of more than 230 mg calcium carbonate per gram zeolite and a magnesium exchange capacity of more than 140 mg magnesium carbonate per gram zeolite. This zeolite A is produced from a reaction mixture having a water to sodium oxide molar ratio of less than 35:1, and a sodium oxide to silica molar ratio of between 1:1 and 4:1, wherein the silica to alumina molar ratio is greater than 3:1 when the sodium oxide to silica molar ratio is less than 4:3 and the sodium oxide to alumina molar ratio is greater than 4:1 when the sodium oxide to silica molar ratio is greater than 4:3. Zeolite X is disclosed having an average particle size less than 2.

Abstract: An improved method for reclaiming waste printing ink is provided wherein waste offset ink is diluted and, thereafter, free water and waste fibrous material is separated through specific gravity differential. A centrifugal method is provided to facilitate separation and to produce an easily disposable waste cake. A heating step is also provided to minimize the quantity of dilutant necessary to reduce fluid friction.

Abstract: A pallet is disclosed which is particularly adapted for supporting in stacked relation thereon groups of articles so as to facilitate fork lift handling and which is fabricated by cutting, scoring and folding a generally rectangular sheet of foldable material, such as, paperboard, or the like, so as to provide a supporting platform with a center portion depressed, or recessed, and forming an upwardly opening pocket, into which, one or more of the articles may be placed, and having a peripheral sidewall extending below the bottom face of the platform which sidewall is spaced from the perimeter of the platform a sufficient distance to provide clearance for the entry of the fork lift arms when the pocket formation is resting on a surface on which the fork lift is operable.

Abstract: A method of increasing the production or efficiency of a process in which a fluid is passed through a matrix the efficiency of which decreases with use in which the matrix is initially filled at a high rate, and an initial flow rate on the order of not more than three times the final flow rate is employed and subsequently decreased to a final flow rate which is lower than the constant flow rate which would be employed in such a process over a period of time such that the integration of the flow rate with respect to time yields a volume of product greater than or equal to the volume produced at a constant flow rate for such product. The above integrated feed program is described specifically as employed in magnetic separations.

Abstract: The corrosion and staining of unlined aluminum tube surfaces by dentifrices such as toothpastes, particularly when the dentifrices contain therapeutic agents, is substantially prevented by incorporation into the dentifrice of a controlled amount of an alkaline earth metal ion such as calcium ion, in the range of 0.005-0.2 weight percent, and preferably in the range of 0.005-0.070 weight percent of the dentifrice. The alkaline earth metal may be provided from any water soluble alkaline earth metal salt or as a reaction product of the alkaline earth metal salt with an amorphous silica abrasive and/or thickener.

Abstract: Novel precipitated silicon dioxide abrasive compositions which can be incorporated into therapeutic toothpaste compositions containing both soluble fluoride salts and soluble phosphate salts are disclosed. The abrasive comprise low structure precipitated silicon dioxides which have been reacted with about 10 to 300 parts per million alkaline earth metal ion, particularly calcium. Reaction with the alkaline earth metal ion minimizes abrasive interaction with the fluoride ion source in therapeutic toothpaste. Also provided are methods for preparation of the novel silicon dioxide abrasives and resulting toothpaste formulations containing such abrasives.

Abstract: A method for producing a precipitated silicon dioxide having a new combination of physical and chemical properties is disclosed. The pigments are produced by acidulating a solution of an alkali metal silicate with an acid under controlled precipitation conditions. The aqueous reaction medium comprising the precipitated silica is then post-conditioned by introducing a second silicate solution into the reaction vessel and thereafter adding additional acid to react with the said second silicate solution. By varying the amount of the silicate employed in the post-conditioning step, a product is obtained which has a unique combination of physical and chemical properties including reduced wet cake moisture content, high surface areas and oil absorptions, improved surface activity, friability, wetting characteristics, and the like. The product has particular utility for use as a rubber reinforcing agent because of its increased surface activity and oil absorption, etc.

Abstract: A method of making pellets from silica, sodium silicates and sodium aluminosilicates by pelletizing the materials in the presence of ammonium stearate. Upon removal from the pelletizer, the formed pellets are dried.

Abstract: The contaminants level of a mother liquor can be reduced in the process of forming solutions of sodium aluminate and sodium silicate, adding together the two solutions to produce a reaction mixture comprising a mother liquor and an amorphous sodium aluminosilicate, reacting the reaction mixture to form a zeolite composition containing zeolite A, recovering the zeolite and recycling the mother liquor. This can be done by heating the zeolite A in the reaction mixture to produce a sodalite type product and recovering that sodalite type product as part of the zeolite composition.

Abstract: An organic elastomer of low heat buildup is made by blending into the elastomer a kaolin clay which has been surface treated with a diisocyanate compound. One method of treating the kaolin clay is to vaporize the diisocyanate compound and contact the vaporized diisocyanate with the clay for from 10 minutes to one hour in the absence of water vapor.

Abstract: A new silica is formed by hydrothermally reacting an aqueous dispersion of silica and sodium hydroxide, under certain conditions, to form a partly polymerized silicate; spray drying the mixture to form spheres of polysilicate; reacting the polysilicate with sulfuric acid to form a synthetic amorphous silica; and filtering, washing and drying the synthetic silica. This silica is useful as an adsorbent in polyol purification. When milled and air classified to the proper particle size, it is useful as a polishing agent in dentrifrices and as a flatting pigment in paints.